Polyaniline by new miniemulsion polymerization and the effect of reducing agent on conductivity

被引：133

作者：

Bhadra, Sambhu ^{[1
]}

Singha, Nikhil K. ^{[1
]}

Khastgir, Dipak ^{[1
]}

机构：

[1] Indian Inst Technol, Ctr Rubber Technol, Kharagpur 721302, W Bengal, India

来源：

SYNTHETIC METALS | 2006年 / 156卷 / 16-17期

关键词：

hopping mechanism; miniemulsion polymerization; polyaniline; reduction;

D O I：

10.1016/j.synthmet.2006.08.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new stable miniemulsion aniline was prepared using sodium dodecyl sulphate (SDS) as the surfactant and cetyl alcohol as the cosurfactant. The oxidative,polymerization reaction was initiated by ammonium peroxy disulphate (APS). At the end of the polymerization reaction polyaniline (PAni),formed was treated with stannous chloride (SnCl2) and finally doped with p-toluene sulphonic acid (PTSA). The monomer to oxidant and polymer to, dopant mole ratio were optimized. Maximum conductivity is obtained with monomer to oxidant mole ratio:: 1 and polymer to dopant mole.ratio;1:0.5. There is a decrease in particle size, and increase in the, solubility in miniemulsion process. Dramatic increase in the conductivity is due to the treatment with SnCl2. Part of the pernigraniline (PNB) form of PAni formed was reduced by SnCl2 to emeraldine base (EB) form having higher,conductivity. Plausible reduction mechanism with SnCl2 is proposed. The conduction mechanism is explained using EPR measurement. The reason for difference in, conductivity, of different forms of,PAni is explained with the help of polaron formation and hole theory. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1148 / 1154

页数：7

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